The narcissist's false emanations are not restricted to messages with emotional content. They may contain wrong or false or partial information. The narcissist does not hesitate to lie, deceive, or "reveal" (misleading) half-truths. He appears to be intelligent, charming and, therefore, reliable. He is a convincing conjurer of words, signs, behaviours, and body language.
The above two classes of victims are casually exploited and then discarded by the narcissist. No more malice is involved in this than in any other interaction with an instrument. No more premeditation and contemplation than in breathing. These are victims of narcissistic reflexes. Perhaps this is what makes it all so repulsively horrific: the offhanded nature of the damage inflicted.
(From the book "Malignant Self-love: Narcissism Revisited" by Sam Vaknin - Click on this link to purchase the print book, or 16 e-books, or 3 DVDs with 16 hours of video lectures on narcissists, psychopaths, and abuse in relationships: http://www.narcissistic-abuse.com/thebook.html)